JPS56100917A - Automatic weir - Google Patents

Abstract

PURPOSE: To simplify the structure of the automatic weir and make it suitable for the small size water passage, by connecting a front and a back gate on a plate with some connecting means so that both gates can be fall down whenever the water pressure charged on the front gate surpasses the fixed level.

CONSTITUTION: When the water level of the water passage 1 is below the height of the overflow weir 2, no waters flow into the automatic weir 3 with the front gate 13 and the back gate 17 in a upright position. Then when the water level of the water passage 1 becomes above the height of the overflow weir 2, the waters go over the weir and flow through the hole 9 on the side wall into the space formed by the base plate 10, front gate 13 and the back gate 17 of the automatic weir 3. The pressure of the waters that flow into the weir 3 pushes and revolves the front gate counter clockwise and whenever it surpasses the preliminerily fixed level, the front gate falls down and the backgate also falls down because of the connecting part 15. Thus the waters that flow over the weir 2 go over the backgate 17 and to the water passage 4 below.

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